Many of us feel the need to keep a set of gear ready "just in case." While everyone's surroundings are sure to be different, many of the gear items will be the same.
For instance, Dyneema and Technora ropes would be a valuable addition to anyone's gear--probably as a replacement for heavier, weaker ropes of nylon or poly.
Dyneema: 1/4" diameter, 8,400 lbs. avg. tensile strength, 1.7 lbs. per 100 feet of rope, critical temp. 150 degrees Farenheit. More Info
Technora: 1/4" diameter, 8,000 lbs. avg. tensile strength, 2.2 lbs. per 100 feet of rope, critical temp. 400 degrees Farenheit. More Info
Both ropes are available in a variety of diameters; these were used just as an example. As you can see, Dyneema is stronger and lighter for the same size, but if the rope might be in a high-temperature application, then Technora is the way to go.
What kind of gear do you guys keep "just in case"?